Sand-blast apparatus.



J. C. PANGBORN & T. HALL.

SAND BLAST APPARATUS.

APPLICATION FILED APR. 28, 190B.

Patented June 22, 1909.

54w mu? W ii 1: camels.-

UNITED STATES PATENT OFFICE.

JOHN C, PANGBORN AND THOMAS HALL, OF BROOKLYN, NEW YORK.

SAND-BLASIT APPARATUS.

Specification of Letters Patent.

Patented June 22, 1909.

To all whom 'it may concern:

Be it known that we, JonN O. PANGBORN and THOMAS HALL, both residing inBrooklyn, county of Kings, State of New York, have invented new anduseful Improvements in Sand-Blast,Apparatus, of which-the following is aspecification.

This invention relates to control of the passage of sand and air from achamber under air pressure also means for preventing the sand fromclogging in the chamber and in the discharge pipe.

In the accom anying drawing forming part of this speci cation is shownthe invention in which Figure 1 is an elevation of the wholemachine,part in section. Fig. 2 is a plan of controlling lever. Fig. 3 is asection of dischar e gate.

Li e figures refer to like parts. I

1 is the chamber containing sand, 2 is a tube reaching through thechamber from top to bottom, 3 is a fitting having flanges screwed ontoand around opening in chamber 1 and connected by screw thread to tube 2,4 is a plu screwed into upper end of fitting 3, 5 is a st ng box on plug4, 6 is a tube inside of tube 2, 7 is a handle or lever fixed to upperend of tube 6, 8 is a quadrant plate supported by arm 9 from fitting 3,10 are holes in quadrant, 11 is a pin'on lever 12 hinged to handle 7, 13isza solid rod through the tube 6 and extending above and below it, 14is a handle fixed to top of rod 13, 15 is a valve or gate formed of ashort tube secured to lower end of tube 6, 16 is an opening in the sideof gate 15 opposite an opening 2 in the tube 2 shown in drawing by adiagonal dotted line across openin 16 shown in Fig. 3, 17 is a prongedfork is the inlet pipe for air, 19 is the outlet pipe, 120 is an openingfor charging with sand having an air ti ht cover, 21 is wheel with vanesadapted to e driven by current of air from pipe 18, 22 is a screwthreadon the shaft of the wind wheel, 23 is a pinion on shaft 24, the iniongearing with the screw and driven by tile, screw, 25 is a pinion on thelower end of shaft 24 and gearing into an internal gear 26, the internalgear being part of a band or tube 27 that surrounds the tube 2 and isheld in place by clea'ts 28 and ring 29 on tube 2,

ed to lower end of rod 13, 18

portions of the band 27 being cut out forming fingers or prongs outsideof openings 2 in tube 2.

' The action of the parts is as follows: sand being provided in chamberand a pressure of air provided, the handle being at the end of quadrant.The opening 16 is opposite the solid part of tube 2 and not opposite theangular opening so that the sand cannot ipiss out. Moving the handle tovarious ed positions on the quadrant brings the opening 16 of the gateopposite the angular opening in tube 2 to a less or greater degree asmay be desired for passage of quantity of sand and held in fixedposition by the pin 11 entering holes or notches in quadrant.

The fork 17 is for the purpose of loosening the sand in the tube 15 andalso in the bend of outlet 19 by moving it up or down or by turning itby handle 14. T e pronged band 27 is for the purpose of preventing thepacking and clogging of sand in the chamber and is designed to be incontinuous operation, the

air pressure driving the wheel 21, on the same shaft is the screw 22which turns the inion 23 and shaft 24 moving the band 27 y the gear 25in 26. v

Having described our invention what we claim and desire to secure byLetters Patent is: v

1. In a sand blastapparatus, a sand chamber, a cylinder in the chamber,openings in the cylinder near the bottom of the chamber, a cylindricalvalve inside of the chamber and having openings to correspond with theopenings in the cylinder so that the valve can be rotated to close theopenings in the'cylinder, a handle connected to the valve, means forlacing the handle in a fixed position to regulate and control the rotarymovement of the valve.

2. In a sand blast apparatus, a sand chamber, a cylinder havingoutletopenings, a hollow valve to control the area of the openings, asand stirrer in the hollow valve and means for moving the stirrerfromthe upper part of the apparatus.

3. In a sand blast apparatus, a sand cham ber, a cylinder having one ormore outlets from near the bottom of the ch mber, a circular stirreraround the cylin er, a wind wheel fitted to be operated by a current ofair and means for connecting the wind wheel to the circular stirrer.

4. In a sand blast apparatus, a chamber, a

tube in the chamber reaching from the top to 5 the bottom, an air inletconnected to the tube, a wind wheel adapted to be driven by air, acircular stirrer around the tube and means for connecting the wind wheelto the stirrer.

JOHN C. PANGBORN. THOS. HALL. Witnesses:

JACOB SCHAEFER, Jr., JENNY CHRISTIANSEN.

